We are often asked by clients if they can set up a local test environment on their computers for various reasons, and in fact if you want to get involved with testing bug fixes for Joomla!® or if you come on any of our Joomla! training courses you'll need to have a local test environment to do that. Here are some walk-through tutorials from around the web of how to set up a test environment on Windows, Mac and Linux (we've given examples for the main Linux systems but others are generally well documented online).